/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.obfuscate;

import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.AttributeVisitor;
import proguard.classfile.editor.ConstantPoolEditor;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.ClassVisitor;

/**
 * This ClassVisitor changes the name stored in the source file attributes and source dir attributes of the classes that
 * it visits, if the attributes are present.
 *
 * @author Eric Lafortune
 */
public class SourceFileRenamer extends SimplifiedVisitor implements ClassVisitor, AttributeVisitor {
    private final String newSourceFileAttribute;

    /**
     * Creates a new SourceFileRenamer.
     * 
     * @param newSourceFileAttribute the new string to be put in the source file attributes.
     */
    public SourceFileRenamer(String newSourceFileAttribute) {
        this.newSourceFileAttribute = newSourceFileAttribute;
    }

    // Implementations for ClassVisitor.

    public void visitProgramClass(ProgramClass programClass) {
        // Only visit the class attributes.
        programClass.attributesAccept(this);
    }

    // Implementations for AttributeVisitor.

    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}

    public void visitSourceFileAttribute(Clazz clazz, SourceFileAttribute sourceFileAttribute) {
        // Fix the source file attribute.
        sourceFileAttribute.u2sourceFileIndex =
            new ConstantPoolEditor((ProgramClass)clazz).addUtf8Constant(newSourceFileAttribute);
    }

    public void visitSourceDirAttribute(Clazz clazz, SourceDirAttribute sourceDirAttribute) {
        // Fix the source file attribute.
        sourceDirAttribute.u2sourceDirIndex =
            new ConstantPoolEditor((ProgramClass)clazz).addUtf8Constant(newSourceFileAttribute);
    }
}
